User manual

Smart Interface User Manual
IM-SIP-B 17
Voltage Zero & Span Adjust
Record the current values shown on the screen before making any
changes to the zero and span settings.
1. Set the DVM to voltage mode and connect between Vout (+) and
Vout (–) on the flow meter terminal block.
2. Select Advanced Options from the main screen. Choose the
Function Selector and select Voltage Zero & Span Adjust.
3. In the DVM Reading Control selector type in the zero voltage
shown on the DVM. Click Continue.
4. Adjust the Zero Control selector to attain a DVM reading of no
less that 0.008 VDC. (You cannot enter negative numbers.) After
entering the new value, click Continue.
5. In the DVM Reading Control selector type in the span voltage
shown on the DVM. Click Continue.
6. Adjust the Span Control selector to attain a DVM reading of
4.99 to 5.01 VDC. After entering the new value, click Continue to
return to the Advanced Options screen. Check the 0-5 VDC indi-
cators to confirm the new values.
Current Zero & Span Adjust
Record the current values shown on the screen before making any
changes to the zero and span settings.
1. Set the DVM to current mode. Connect the meter in the output
loop by disconnecting the 4-20 out (+) wire from terminal. Con-
nect + of DVM to the 4-20 out (+) terminal and the – of the
DVM to the wire you just disconnected. If no loop is present,
connect the DVM between 4-20 out (+) and 4-20 out (–) on the
flow meter terminal block. (For best results, use an 100 to 250
Ohm resistor in series with the DVM.)
2. Select Advanced Options from the main screen. Choose the
Function Selector and select Current Zero & Span Adjust.
3. In the DVM Reading Control selector type in the zero current
shown on the DVM. Click Continue. In the DVM Reading
Control selector type in the span current shown on the DVM.
Click Continue.
4. Adjust the Zero Control selector to attain a DVM reading between
3.95 and 4.05 mA. After entering the new value, click Continue.
5. Adjust the Span Control selector to attain a DVM reading
between 19.95 to 20.05 mA. After entering the new value,
click Continue to return to the Advanced Options screen.
Check the 4-20 mA indicators to confirm the new values.
Caution!
The flow meter must
not be reporting or
measuring gas flow
during adjustments.
Adjusting zero or
span will affect meter
calibration.
Warning!
Do not open the flow
meter enclosure in a
hazardous area.